Breaking the Ice (Dandere!Len Kagamine X Reader)

Len and you had been friends for a long time, since you were practically toddlers. Then after an awful incident Len refuses to open up to anyone in fear out of what happened, even you. But now it's your first year of high school, and you want to try and break the ice that froze between you and your short time love. What will ensue?
(Rated: PG for mildly scary scenes, but no real violence or action.)
(Because there isn't enough of Dandere!Len in the world, also I kind of based this off of the anime known as Kimi no Todoke.)